Bird cage top



FIG. 1 is a perspective view showing my new design;

FIG. 2 is a reduced perspective view of the bird cage top in the position of use, the broken line showing of a cage being for illustrative purposes only and forms no part of the claimed design;

FIG. 3 is an enlarged front view of the bird cage top shown in FIG. 1 , the rear being a mirror image thereof;

FIG. 4 is an enlarged side view of the bird cage top shown in FIG. 1 , the opposite side being a mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a bird cage top, as shown and described. 